Custom listview with empty arraylist

Listview with image and two textviews. It crashes the first time i enter if theres no object to print or to show. It cant get a blank listview if the arraylist is empty.

public contactoAdapter(Context context, ArrayList<contactoAgenda> datos) {
                super(context, R.layout.listview_item, datos);
                // Guardamos los par�metros en variables de clase.
                this.context = context;
                this.datos = datos;
            }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            View item = convertView; 
            contactoHolder holder;

            if (item == null) {
                item = LayoutInflater.from(context).inflate(R.layout.listview_item,
                        null);

                holder = new contactoHolder();
                holder.imgContacto = (ImageView) item.findViewById(R.id.imagenContacto);
                holder.tvMail = (TextView) item.findViewById(R.id.tvMail);
                holder.tvNombre = (TextView) item.findViewById(R.id.tvNombre);

                // Almacenamos el holder en el Tag de la vista.
                item.setTag(holder);
            }

            holder = (contactoHolder) item.getTag();

           holder.imgContacto.setImageResource(datos.get(position).getDrawableImageID());

            holder.tvNombre.setText(datos.get(position).getNombre());
            holder.tvMail.setText(datos.get(position).getDireccion());


            return item;
        }

I fill the arraylist with all the contacts in one table. So the first time the table is empty till you fill in with some contacts.

public ArrayList<contactoAgenda> recuperarTodosContactos() {
        SQLiteDatabase db = getReadableDatabase();
        ArrayList<contactoAgenda> lista_contactos = new ArrayList<contactoAgenda>();
        String[] valores_recuperar = {"nombre","direccion","telefono","email","miembrofacebook","miembrotwitter","miembrogoogle","miembrolinkedin","sexo","tipocontacto","imagen"};
        Cursor c = db.query("contactos", valores_recuperar, null, null, null, null, null, null);
        c.moveToFirst();
        do {
            contactoAgenda contactos = new contactoAgenda(c.getString(0), c.getString(1), c.getString(2), c.getString(3),c.getInt(4), c.getInt(5), c.getInt(6), c.getInt(7),c.getInt(8), c.getString(9), c.getInt(10));
            lista_contactos.add(contactos);
        } while (c.moveToNext());


        db.close();
        c.close();
        return lista_contactos;
    }

I call it like using global variables, the important thing i get an arraylist of contacts to display in thee adapter. Every case works fine except the particular one. The first time the arraylist is empty. Ive tried a listview with contacts and delete them and i can get the listview in blank... Dont know the reason. If the arraylist is empty, it had to show a blank listview:

AgendaGlobal.getInstance().miAgenda = BaseDatosGlobal.getInstance(this).agendaBaseDatos.recuperarTodosContactos();

                Toast.makeText(getApplicationContext(),"Hasta aqui ya no", Toast.LENGTH_LONG).show();

                adapter = new contactoAdapter(this, AgendaGlobal.getInstance().miAgenda);

                lvContactos = (ListView) findViewById(R.id.lvItems);
                // Asignamos el Adapter al ListView, en este punto hacemos que el
                // ListView muestre los datos que queremos.


                lvContactos.setAdapter(adapter);